Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

William Siemiaszko, DDS

Individual provider Dentist · NPI 1720295009

William Siemiaszko, DDS is a Dentist in Seekonk, Massachusetts. Licensed in Connecticut, Massachusetts, New York and Ohio and 2 more. Registered with an NPI since 2007.

Licensed in
CT, MA, NY, OH, PA, RI
In the registry since
2007
Specialties on file
6
What do these letters mean?
DDS — Doctor of Dental Surgery
A dentist. DDS and DMD are the same qualification — universities choose which title to award.

See every abbreviation used in this directory →

Practice location Address checks out

20 Commerce Way
Seekonk, MA 02771-5823
Phone: (508) 336-6700
Fax: (508) 336-6742
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Dentist (primary) Taxonomy 122300000X · Licence 21050 (MA)
Dentist Taxonomy 122300000X · Licence 004430 (CT)
Dentist Taxonomy 122300000X · Licence DEN02924 (RI)
Dentist Taxonomy 122300000X · Licence 052591-1 (NY)
Dentist Taxonomy 122300000X · Licence 30-022317 (OH)
Dentist Taxonomy 122300000X · Licence DS036764 (PA)

Record details

NPI number1720295009
Entity typeIndividual (Type 1)
GenderMale
Credentials DDS
Sole proprietorNo
NPI enumeratedMay 17, 2007
Last updated in NPPESJuly 8, 2007
Mailing addressPo Box 3189, Syracuse, NY 13220-3189

Other providers in Seekonk